curl: rebuild when libopenssl config changes

When some libopenssl options change curl will have to be rebuild to
adapt to those changes, avoiding undefined reference errors or features
disabled in curl.

Add CONFIG_OPENSSL_ENGINE, CONFIG_OPENSSL_WITH_COMPRESSION and
CONFIG_OPENSSL_WITH_NPN to PKG_CONFIG_DEPENDS so it will trigger
rebuild every time the options are changed.

Signed-off-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>

package/network/utils/curl/Makefile

@@ -64,7 +64,11 @@ PKG_CONFIG_DEPENDS:= \
   CONFIG_LIBCURL_TLS_SRP \
   CONFIG_LIBCURL_UNIX_SOCKETS \
   CONFIG_LIBCURL_VERBOSE \
-  CONFIG_LIBCURL_NTLM
+  CONFIG_LIBCURL_NTLM \
+  $(if $(CONFIG_LIBCURL_OPENSSL), \
+	CONFIG_OPENSSL_ENGINE \
+	CONFIG_OPENSSL_WITH_COMPRESSION \
+	CONFIG_OPENSSL_WITH_NPN)
 
 include $(INCLUDE_DIR)/package.mk